Kerby Joseph ‘s regular season is over. The Lions announced that they’ve placed the safety on IR with a knee injury. The team activated left guard Christian Mahogany from IR in a corresponding move.
Joseph hasn’t played since a loss to the Chiefs in Week 6, which will go down as his last appearance of the regular season. He’ll miss the Lions’ final three games. In the event the 8-6 club makes a successful charge for a playoff spot, Joseph won’t be eligible for its first-round matchup.
After leading the NFL with nine interceptions and earning first-team All-Pro honors in 2024, Joseph inked a four-year, $86MM extension last April. Although the 25-year-old ballhawk only played in six games this season, he still managed to pick off three passes. Joseph had finally been progressing toward a return, but a setback suffered in practice last week forced the Lions to shut him down.
The Lions entered the season with arguably the league’s best safety tandem in Joseph and Brian Branch . They’ll finish the regular season (and perhaps the playoffs) without either.
Branch tore his Achilles in a Week 14 win over the Cowboys. The Lions’ weakened defense then struggled in a 41-34 loss to the Rams in Week 15. The Rams amassed 519 total yards, including 368 through the air. With Joseph, Branch, and the concussed Thomas Harper unavailable, Avonte Maddox and Erick Hallett got the majority of playing time at safety. Hallett is now out of the organization after the Titans signed him off the Lions’ practice squad on Tuesday, but Harper has cleared concussion protocol and will play against the Steelers on Sunday.
Mahogany, a second-year man who has started in all eight appearances this season, has missed six games in a row with a fractured fibula. He’s now active again 10 days after Detroit opened his 21-day practice window, though Mahogany is still listed as questionable for Week 16. Three other Lions offensive linemen (Graham Glasgow , Taylor Decker , and Trystan Colon ) are also questionable. Detroit’s banged-up line will face a shorthanded Pittsburgh pass rush, though, with T.J. Watt (lung) and Nick Herbig (hamstring) set to miss the game.

